There are 110 goldfish in the pond when the availability of resources decreases. The carrying capacity
drops from 125 to 90 goldfish. Which of the following statements is true under these conditions? Check
all that apply.

When the carrying capacity in a goldfish pond decreases from 125 to 90, the populations that the pond can support are 90 fish or less, that is, the pond can support a population of 90, 75 and 50 goldfish.

Explanation:

Options for this question:

In population dynamics, carrying capacity is defined as the maximum number of individuals that can live in a given place, depending on the resources available, such as space, food and water. This concept is also applicable to ecosystems.

If in the pond the carrying capacity decreased to 90 goldfish means that the available resources are only sufficient to maintain a number equal or less than 90 goldfish, so it can be said that:

When a population exceeds its carrying capacity, the mortality rate in that population usually increases.

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Carrying capacity link

1. a tropical dry forest carries out more rapid nutrient cycling

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!